39554045521 has 2 divisors, whose sum is σ = 39554045522. Its totient is φ = 39554045520.

The previous prime is 39554045501. The next prime is 39554045551. The reversal of 39554045521 is 12554045593.

39554045521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38215949121 + 1338096400 = 195489^2 + 36580^2 .

It is an emirp because it is prime and its reverse (12554045593) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39554045521 - 2¹³ = 39554037329 is a prime.

It is a super-2 number, since 2×39554045521² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (39554045501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19777022760 + 19777022761.

It is an arithmetic number, because the mean of its divisors is an integer number (19777022761).

Almost surely, 2^39554045521 is an apocalyptic number.

It is an amenable number.

39554045521 is a deficient number, since it is larger than the sum of its proper divisors (1).

39554045521 is an equidigital number, since it uses as much as digits as its factorization.

39554045521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540000, while the sum is 43.

The spelling of 39554045521 in words is "thirty-nine billion, five hundred fifty-four million, forty-five thousand, five hundred twenty-one".